Na h-Eileanan Siar · Scotland
Sand mastic for sash & case windows in Sandwick, Na h-Eileanan Siar
We cover Sandwick for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly.
- Weathered mastic on the most exposed windows
- A silicone bead on a sash window that spoils the look
- Cement or filler used on old window joints that has cracked
FAQs for Sandwick
Is sand mastic in a coastal place like Sandwick any different?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Is Sandwick within the area you cover?
Yes, smaller places are covered as well as towns. We work across all of Scotland, including the islands, where work is planned around ferry crossings. Just mention lanes, gates or anything else about the route when you book.
What exactly is sand mastic?
It’s the traditional filler for the joint round timber windows and doors. It’s made with sand and a linseed-oil-based binder.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. We can talk about working times when we quote.
Do the sealants smell?
It depends on the product. Some smell for a while, some hardly at all.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator.
What guarantee comes with the work?
All our work has a 12-month guarantee, and we are fully insured.
How long does sand mastic take to go off?
Not straight away. It skins first and hardens fully later and we’ll give you an idea for your job.
Sand mastic in Sandwick, done properly
A silicone bead around a sash window can look out of place and isn’t always the right material. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. We work on brick reveals, sash and case windows and timber door frames, and people most often call us about draughty sash windows at the surround and tired mastic found when preparing windows for paint.
In and around a place like Sandwick, homes range from older stone-built cottages to newer houses. Wind-driven rain finds any gap around a frame or sill.
You get a one-year guarantee, the same in Sandwick as everywhere else we work.
- Where
- Sandwick (HS1, HS2)
- Wider area
- Na h-Eileanan Siar
- Cover
- 12 months on all our work
- Price
- A clear price before work begins
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
For landlords and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
We work for landlords and agents as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
Why it’s worth doing now in Sandwick
Cement-based fillers and modern sealants do not always suit a period surround. Sand mastic is the like-for-like choice and that can be important for listed homes. Around Sandwick, water from a failed joint in an older stone home can soak into timber and plaster.
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Why Sandwick customers choose us
- Every job guaranteed for a year
- Approved under the ARBOMaster scheme
- Homes, businesses and hotels
- 180+ five-star Google reviews
Signs you need sand mastic in Sandwick
Most of it is simply age. Sand mastic is a maintenance item like any pointing and how long it lasts depends on the weather it faces.
The problems people normally mention when they call are:
- Draughty sash windows at the surround
- Old cement repairs round a window that have failed
- Gaps where the frame meets the masonry
- Modern sealant on a period surround
In and around Sandwick, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
What your quote should include
- What happens if they find a problem under the old sealant
- What product goes in the joint
- Whether VAT is included
- Who does the work, and how experienced they are
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Clear gutters so water doesn’t pour onto the windows
- Find out about consent before window work on a listed home
- Plan mastic work ahead of painting
- Keep modern sealant off the mastic
Look at the mastic when you look over the windows. Catching cracks early keeps repairs small.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall so early renewal protects both.
What affects the quote in Sandwick
We quote each job individually. These are the things that affect it:
- Working hours on commercial sites
- The number of rooms or windows
- The size of the job
- Access and height
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
Asking for a quote
You don’t need to know the technical terms. Just tell us:
- Any access issues, like height or stairs
- What’s wrong with the joints now
- If someone has resealed it before
- The address or postcode of the job
We don’t publish a price list, because every job is different. Instead, your job gets its own clear quote. To get started, email us at info@mrmastic.co.uk.
What sand mastic looks like in Sandwick
Sandwick is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. Island jobs need planning around ferries and the weather, so give us as much notice as you can.
For an older house near a landmark such as Stornoway High Church, the joint between an old wall and a newer frame is generally the first place rain gets in.
Sandwick is about 1 mile south-east of Stornoway, in Na h-Eileanan Siar. Across the HS1 area, our applicators can take on sand mastic. 87 places in Na h-Eileanan Siar are on our list, large and small.
Here we cover the HS1 and HS2 postcode area for sand mastic. You will find streets such as Stoneyfield, East Street and Olivers Brae, all of which we cover. If you’re just outside Sandwick, we cover Plasterfield (1 mile north), Sanndabhaig (1 mile east), Steinis (1 mile north), Stornoway (1 mile north-west) and Branahuie (1 mile east). Remote and island addresses need a little more planning, so please mention your location when you send an email to info@mrmastic.co.uk.
Local landmarks in Sandwick
A little further out are Western Isles Hospital (1.5 miles north-west) and Lewis Loom Centre (1.3 miles west). Open spaces near Sandwick include Loch Àirigh na Lic.
What we do, step by step
When we get to you, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours for a single window, longer for several. In smaller Scottish places, parking is usually less of an issue than access and distance. Let us know how to find you and how to reach the joints, and the visit is planned around that.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Before we arrive
- Tell us if parking is tricky
- Let us know about earlier repairs to the joints
- Let us know about stairs, lifts or work at height
Getting a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we will explain what’s involved and give you a clear price.
Read more
What sealant work cannot fix
To be straight with you, some problems need a different trade:
- Crumbling stone or brickwork round the window
- Decisions on consent for listed homes
- Putty and glazing repairs
If in doubt, send an email to info@mrmastic.co.uk and we’ll say what we think.
Surfaces we seal
- Tenement windows
- Sash and case windows
- Brick reveals
- Stone surrounds
- Period & listed homes
- Timber door frames